Add connectors release notes for 9.1.2 (elastic#132716)

Author: charlotte-hoblik

docs/reference/search-connectors/release-notes.md

@@ -13,6 +13,9 @@ If you are an Enterprise Search user and want to upgrade to Elastic 9.0, refer t
 It includes detailed steps, tooling, and resources to help you transition to supported alternatives in 9.x, such as Elasticsearch, the Open Web Crawler, and self-managed connectors.
 :::
 
+## 9.1.2 [connectors-9.1.2-release-notes]
+There are no new features, enhancements, fixes, known issues, or deprecations associated with this release.
+
 ## 9.1.1 [connectors-9.1.1-release-notes]
 
 ### Fixes [connectors-9.1.1-fixes]